/***************************************************************
 Copyright (c) 2021 ShenZhen Panath Technology Co., Ltd.
 SPDX-License-Identifier: Apache-2.0
 ***************************************************************/

#include "common.h"
#ifdef ENABLE_DPDK_LIB
#include "rte_hash_crc.h"
#endif

static const uint32_t __cacheline_aligned hash_static_table[256] = {
  0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L,
  0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L,
  0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L,
  0x90bf1d91L, 0x1db71064L, 0x6ab020f2L, 0xf3b97148L, 0x84be41deL,
  0x1adad47dL, 0x6ddde4ebL, 0xf4d4b551L, 0x83d385c7L, 0x136c9856L,
  0x646ba8c0L, 0xfd62f97aL, 0x8a65c9ecL, 0x14015c4fL, 0x63066cd9L,
  0xfa0f3d63L, 0x8d080df5L, 0x3b6e20c8L, 0x4c69105eL, 0xd56041e4L,
  0xa2677172L, 0x3c03e4d1L, 0x4b04d447L, 0xd20d85fdL, 0xa50ab56bL,
  0x35b5a8faL, 0x42b2986cL, 0xdbbbc9d6L, 0xacbcf940L, 0x32d86ce3L,
  0x45df5c75L, 0xdcd60dcfL, 0xabd13d59L, 0x26d930acL, 0x51de003aL,
  0xc8d75180L, 0xbfd06116L, 0x21b4f4b5L, 0x56b3c423L, 0xcfba9599L,
  0xb8bda50fL, 0x2802b89eL, 0x5f058808L, 0xc60cd9b2L, 0xb10be924L,
  0x2f6f7c87L, 0x58684c11L, 0xc1611dabL, 0xb6662d3dL, 0x76dc4190L,
  0x01db7106L, 0x98d220bcL, 0xefd5102aL, 0x71b18589L, 0x06b6b51fL,
  0x9fbfe4a5L, 0xe8b8d433L, 0x7807c9a2L, 0x0f00f934L, 0x9609a88eL,
  0xe10e9818L, 0x7f6a0dbbL, 0x086d3d2dL, 0x91646c97L, 0xe6635c01L,
  0x6b6b51f4L, 0x1c6c6162L, 0x856530d8L, 0xf262004eL, 0x6c0695edL,
  0x1b01a57bL, 0x8208f4c1L, 0xf50fc457L, 0x65b0d9c6L, 0x12b7e950L,
  0x8bbeb8eaL, 0xfcb9887cL, 0x62dd1ddfL, 0x15da2d49L, 0x8cd37cf3L,
  0xfbd44c65L, 0x4db26158L, 0x3ab551ceL, 0xa3bc0074L, 0xd4bb30e2L,
  0x4adfa541L, 0x3dd895d7L, 0xa4d1c46dL, 0xd3d6f4fbL, 0x4369e96aL,
  0x346ed9fcL, 0xad678846L, 0xda60b8d0L, 0x44042d73L, 0x33031de5L,
  0xaa0a4c5fL, 0xdd0d7cc9L, 0x5005713cL, 0x270241aaL, 0xbe0b1010L,
  0xc90c2086L, 0x5768b525L, 0x206f85b3L, 0xb966d409L, 0xce61e49fL,
  0x5edef90eL, 0x29d9c998L, 0xb0d09822L, 0xc7d7a8b4L, 0x59b33d17L,
  0x2eb40d81L, 0xb7bd5c3bL, 0xc0ba6cadL, 0xedb88320L, 0x9abfb3b6L,
  0x03b6e20cL, 0x74b1d29aL, 0xead54739L, 0x9dd277afL, 0x04db2615L,
  0x73dc1683L, 0xe3630b12L, 0x94643b84L, 0x0d6d6a3eL, 0x7a6a5aa8L,
  0xe40ecf0bL, 0x9309ff9dL, 0x0a00ae27L, 0x7d079eb1L, 0xf00f9344L,
  0x8708a3d2L, 0x1e01f268L, 0x6906c2feL, 0xf762575dL, 0x806567cbL,
  0x196c3671L, 0x6e6b06e7L, 0xfed41b76L, 0x89d32be0L, 0x10da7a5aL,
  0x67dd4accL, 0xf9b9df6fL, 0x8ebeeff9L, 0x17b7be43L, 0x60b08ed5L,
  0xd6d6a3e8L, 0xa1d1937eL, 0x38d8c2c4L, 0x4fdff252L, 0xd1bb67f1L,
  0xa6bc5767L, 0x3fb506ddL, 0x48b2364bL, 0xd80d2bdaL, 0xaf0a1b4cL,
  0x36034af6L, 0x41047a60L, 0xdf60efc3L, 0xa867df55L, 0x316e8eefL,
  0x4669be79L, 0xcb61b38cL, 0xbc66831aL, 0x256fd2a0L, 0x5268e236L,
  0xcc0c7795L, 0xbb0b4703L, 0x220216b9L, 0x5505262fL, 0xc5ba3bbeL,
  0xb2bd0b28L, 0x2bb45a92L, 0x5cb36a04L, 0xc2d7ffa7L, 0xb5d0cf31L,
  0x2cd99e8bL, 0x5bdeae1dL, 0x9b64c2b0L, 0xec63f226L, 0x756aa39cL,
  0x026d930aL, 0x9c0906a9L, 0xeb0e363fL, 0x72076785L, 0x05005713L,
  0x95bf4a82L, 0xe2b87a14L, 0x7bb12baeL, 0x0cb61b38L, 0x92d28e9bL,
  0xe5d5be0dL, 0x7cdcefb7L, 0x0bdbdf21L, 0x86d3d2d4L, 0xf1d4e242L,
  0x68ddb3f8L, 0x1fda836eL, 0x81be16cdL, 0xf6b9265bL, 0x6fb077e1L,
  0x18b74777L, 0x88085ae6L, 0xff0f6a70L, 0x66063bcaL, 0x11010b5cL,
  0x8f659effL, 0xf862ae69L, 0x616bffd3L, 0x166ccf45L, 0xa00ae278L,
  0xd70dd2eeL, 0x4e048354L, 0x3903b3c2L, 0xa7672661L, 0xd06016f7L,
  0x4969474dL, 0x3e6e77dbL, 0xaed16a4aL, 0xd9d65adcL, 0x40df0b66L,
  0x37d83bf0L, 0xa9bcae53L, 0xdebb9ec5L, 0x47b2cf7fL, 0x30b5ffe9L,
  0xbdbdf21cL, 0xcabac28aL, 0x53b39330L, 0x24b4a3a6L, 0xbad03605L,
  0xcdd70693L, 0x54de5729L, 0x23d967bfL, 0xb3667a2eL, 0xc4614ab8L,
  0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL,
  0x2d02ef8dL
};

#if 0
uint16_t
hash16_calc_ipv4(uint32_t src_ip,
                 uint32_t dst_ip,
                 uint16_t src_port,
                 uint16_t dst_port,
                 uint8_t  proto)
{
    uint32_t reg = 0xFFFFFFFF;
    uint32_t i;
    uint8_t  *tmp_data;

    tmp_data = (uint8_t *)&src_ip;
    for (i = 0; i < 4; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = (uint8_t *)&dst_ip;
    for (i = 0; i < 4; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = (uint8_t *)&src_port;
    for (i = 0; i < 2; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = (uint8_t *)&dst_port;
    for (i = 0; i < 2; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ proto];

    return reg;
}

uint16_t
hash16_calc_ipv6(uint8_t *src_ip1,
                 uint8_t *dst_ip1,
                 uint32_t label,
                 uint16_t src_port,
                 uint16_t dst_port,
                 uint8_t  proto)
{
	printf("hash16_calc_ipv6: label=%d, src_port=%d, dst_port=%d\n, proto=%d\n",
		label, src_port, dst_port, proto);
	uint32_t reg = 0xFFFFFFFF;
    uint32_t i;
    uint8_t  *tmp_data;

    tmp_data = src_ip1;
    for (i = 0; i < 16; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = dst_ip1;
    for (i = 0; i < 16; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = (uint8_t *)&label;
    for (i = 0; i < 4; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = (uint8_t *)&src_port;
    for (i = 0; i < 2; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = (uint8_t *)&dst_port;
    for (i = 0; i < 2; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ proto];

    return reg;

}

uint16_t
hash16_calc_mac(uint8_t *src_mac, uint8_t *dst_mac)
{
    uint32_t reg = 0xFFFFFFFF;
    uint32_t i;
    uint8_t  *tmp_data;

    tmp_data = (uint8_t *)&src_mac;
    for (i = 0; i < 6; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    tmp_data = (uint8_t *)&dst_mac;
    for (i = 0; i < 6; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    return reg;
}
#endif

#ifdef ENABLE_DPDK_LIB
uint16_t hash16_by_short(uint16_t iv, uint16_t datum)
{
    return rte_hash_crc_2byte(datum, 0);
}

uint16_t hash16_by_int(uint16_t iv, uint32_t datum)
{
    return rte_hash_crc_4byte(datum, 0);
}

uint16_t hash16_by_long(uint16_t iv, uint64_t datum)
{
    return rte_hash_crc_8byte(datum, 0);
}

uint16_t
hash16_calc_ipv4(uint64_t ipv4, uint32_t port, uint16_t  proto,
    uint32_t *aux_info)
{
    uint32_t tmp_val;

    tmp_val   = rte_hash_crc_8byte(ipv4, 0);
    *aux_info = tmp_val;
    return (tmp_val
        ^ rte_hash_crc_4byte(port, 0)
        ^ rte_hash_crc_2byte(proto, 0));
}

uint16_t
hash16_calc_ipv6(uint64_t *ip, uint32_t port, uint32_t label, uint16_t  proto,
    uint32_t *aux_info)
{
    uint32_t tmp_val;

    tmp_val = (rte_hash_crc_8byte(*(uint64_t *)(ip + 0), 0)
             ^ rte_hash_crc_8byte(*(uint64_t *)(ip + 1), 0)
             ^ rte_hash_crc_8byte(*(uint64_t *)(ip + 2), 0)
             ^ rte_hash_crc_8byte(*(uint64_t *)(ip + 3), 0));
    *aux_info = tmp_val;
    return (tmp_val
        ^ rte_hash_crc_4byte(port, 0)
        ^ rte_hash_crc_4byte(label, 0)
        ^ rte_hash_crc_2byte(proto, 0));
}

uint16_t
hash16_calc_mac(uint8_t *mac, uint32_t *aux_info)
{
    uint32_t tmp_val;

    tmp_val   = rte_hash_crc_8byte(*(uint64_t *)(mac + 0), 0);
    *aux_info = tmp_val;
    return (tmp_val ^ rte_hash_crc_4byte(*(uint32_t *)(mac + 8), 0));
}

uint16_t
hash16_calc_ethernet(uint8_t *mac, uint32_t llc, uint32_t *aux_info)
{
    uint32_t tmp_val;

    tmp_val   = rte_hash_crc_8byte(*(uint64_t *)(mac + 0), 0);
    *aux_info = tmp_val;
    return (tmp_val
            ^ rte_hash_crc_4byte(*(uint32_t *)(mac + 8), 0)
            ^ rte_hash_crc_4byte(llc, 0));
}

uint16_t
hash16_calc_uint32(uint32_t input)
{
    uint32_t reg = 0xFFFFFFFF;
    uint32_t i;
    uint8_t  *tmp_data;

    tmp_data = (uint8_t *)&input;
    for (i = 0; i < 4; i++)
    {
        reg = (reg << 8) ^ hash_static_table[((reg>>24) & 0xFF) ^ tmp_data[i]];
    }

    return reg;
}
#else
uint16_t hash16_by_short(uint16_t iv, uint16_t datum)
{
    uint16_t poly = 0x1021;
    int i, j;
    uint32_t b;

    for (i=sizeof(datum)-1; i>=0; i--)
    {
        b = (datum >> (i*8)) & 0xff;
        for (j=7; j>=0; j--)
        {
            iv = ((iv << 1) ^ ((((iv >> 15)&1) ^ ((b >> j)&1)) ? poly : 0)) & 0xffff;
        }
    }
    return iv;
}

uint16_t hash16_by_int(uint16_t iv, uint32_t datum)
{
    uint16_t poly = 0x1021;
    int i, j;
    uint32_t b;

    for (i=sizeof(datum)-1; i>=0; i--)
    {
        b = (datum >> (i*8)) & 0xff;
        for (j=7; j>=0; j--)
        {
            iv = ((iv << 1) ^ ((((iv >> 15)&1) ^ ((b >> j)&1)) ? poly : 0)) & 0xffff;
        }
    }
    return iv;
}

uint16_t hash16_by_long(uint16_t iv, uint64_t datum)
{
    uint16_t poly = 0x1021;
    int i, j;
    uint32_t b;

    for (i=sizeof(datum)-1; i>=0; i--)
    {
        b = (datum >> (i*8)) & 0xff;
        for (j=7; j>=0; j--)
        {
            iv = ((iv << 1) ^ ((((iv >> 15)&1) ^ ((b >> j)&1)) ? poly : 0)) & 0xffff;
        }
    }
    return iv;
}

uint16_t
hash16_calc_ipv4(uint64_t ipv4, uint32_t port, uint16_t  proto,
    uint32_t *aux_info)
{
    uint64_t ulTmp;
    uint16_t usTag, usIpTag, usPortTag, usProtoTag, usProto;

    usIpTag = hash16_by_long(0, ipv4);
    *aux_info = usIpTag;

    ulTmp = port;
    ulTmp = ((ulTmp << 32) & 0xFFFFFFFF00000000UL);
    usPortTag = hash16_by_long(0, ulTmp);

    usProto = proto;
    usProtoTag = hash16_by_short(0, usProto);

    usTag = ((usIpTag ^ usPortTag) ^ usProtoTag);

    return usTag;
}

uint16_t
hash16_calc_ipv6(uint64_t *ip, uint32_t port, uint32_t label, uint16_t  proto,
    uint32_t *aux_info)
{
    uint64_t ulTmp, ulT2;
    uint16_t usTag, usProto;
    uint16_t usSrcTag1, usDstTag1, usSrcTag2;
    __mb_unused uint16_t usDstTag2;

    usSrcTag1 = hash16_by_long(0, ip[0]);
    usSrcTag2 = hash16_by_long(0, ip[1]);
    usDstTag1 = hash16_by_long(0, ip[2]);
    usDstTag2 = hash16_by_long(0, ip[3]);

    usTag = ((usSrcTag1 ^ usSrcTag2)^(usDstTag1 ^ usDstTag2));
    *aux_info = usTag;


    ulT2 = label;
    ulTmp = ((ulT2 << 32) & 0xFFFFFFFF00000000UL);
    usDstTag1 = hash16_by_long(0, ulTmp);

    usTag = (usTag ^ usDstTag1);


    ulT2 = port;
    ulTmp = ((ulT2 << 32) & 0xFFFFFFFF00000000UL);
    usDstTag1 = hash16_by_long(0, ulTmp);

    usTag = (usTag ^ usDstTag1);


    usProto = proto;
    usSrcTag1 = hash16_by_short(0, usProto);

    usTag = (usTag ^ usSrcTag1);


    return usTag;
}

uint16_t
hash16_calc_mac(uint8_t *mac, uint32_t *aux_info)
{
    uint16_t usTag;
    uint16_t usSrcTag1, usDstTag1;

    usSrcTag1 = hash16_by_long(0, *(uint64_t *)(mac + 0));
    usDstTag1 = hash16_by_long(0, *(uint32_t *)(mac + 8));
    *aux_info = usSrcTag1;

    usTag = (usSrcTag1 ^ usDstTag1);

    return usTag;
}

uint16_t
hash16_calc_ethernet(uint8_t *mac, uint32_t llc, uint32_t *aux_info)
{
    uint16_t usTag;
    uint16_t usSrcTag1, usDstTag1;

    usSrcTag1 = hash16_by_long(0, *(uint64_t *)(mac + 0));
    usDstTag1 = hash16_by_int(0, *(uint32_t *)(mac + 8));
    *aux_info = usSrcTag1;

    usTag = (usSrcTag1 ^ usDstTag1 ^ hash16_by_int(0, llc));

    return usTag;
}

uint16_t
hash16_calc_uint32(uint32_t input)
{
    uint64_t ulTmp, ulT2;
    uint16_t usTag;

    ulT2  = input;
    ulTmp = ((ulT2 << 32) & 0xFFFFFFFF00000000UL);
    usTag = hash16_by_long(0, ulTmp);

    return usTag;
}
#endif

